'Numeric Demonstrator', c 1900.

Image number: 10327841

'Numeric Demonstrator', c 1900.

This elementary arithmetical teaching apparatus, patented by Ethel Linay in about 1900, consists of ten wooden rods with squared paper pasted on them in order to show multiplication visually.

Image number:
10327841
Credit:
Science Museum/Science & Society Picture Library
Date taken:
30 October 2003 09:16
Image rights:
Science Museum